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Université de Jilin (2019)

Bionic Study on Body Surface Erosion Resistance of Semi-desert Parabuthus Transvaalicus

陈文娜;

Titre : Bionic Study on Body Surface Erosion Resistance of Semi-desert Parabuthus Transvaalicus

Auteur : 陈文娜;

Grade : Master’s Theses 2019

Université : Université de Jilin

Résumé partiel
When two or more parts are in relative motion on the contact surfaces,the wear is caused by friction,which directly leads to the reliability and service life of the parts,the low work efficiency,the increase of the consumable parts,etc.,which indirectly leads to energy loss,increased maintenance costs,and low economic efficiency.Erosion is an important branch of the wear field.It is widely applied to many domains,including wind turbines,compressors,flotation machines,drill strings,screens,logistics pipelines,turbine engines,etc.,which caused great inconvenience and harm to human production and life.At present,composite materials,surface coatings,surface modification and other methods have been widely used in materials to improve the erosion resistance of materials.However,these methods can reduce erosion to a certain extent,but considering the manufacturing technology,manufacturing process,cost and green development,they are not good enough to achieve the desired results.Therefore,whether it is from the perspective of energy conservation or the reliability of parts and the efficiency of production,it is extremely urgent to find a more convenient and adaptable method for erosion resistance.Inspired by bionics,Parabuthus transvaalicus,a scorpion found in semi-desert,was chosen as biological prototype.The morphological characteristics of the back of the scorpion were analyzed by various microscopes,and the typical structures and the relevant dimensional parameters of the back of the scorpion were extracted.It was found that the width of seven terga of the scorpion were different.The surface of the seven terga are distributed with convex hulls,which were different sizes and uneven.In addition,the convex hulls on both sides of the seven terga are dense,and the middle is sparse and three ridges are formed.The seven terga of the scorpion are connected through intersegmental membrane,which form natural V-grooves on the surface.In terms of the width of the V-grooves increases first and then decreases,while the height shows a trend of decreasing first and then increasing.The back of the scorpion is an arc-shaped structure with curvature,and the curvature of the middle portion is larger than the curvature of the both sides

Mots clés : Semi-desert scorpion; Surface structure and morphology; Erosion resistance; ANSYS/FLUENT; Numerical simulation; Bionic manufacturing;

Présentation (CNKI)

Page publiée le 20 mai 2020